. >>> josh, we have the scary explosion in kansas city. >> we have breaking news to get to. but today, it follows the best news of all. we love you. welcome back. we're going to turn, now, to kansas city and that massive explosion you saw at the top of the show. it leveled part of a shopping complex in kansas city. police, right now, are searching for any people who might still be trapped in the rubble. abc's alex perez has been on the scene all night and joins us right now with the very latest. good morning, alex. >> reporter: good morning, josh. and welcome back to, robin. right here in kansas city, at least one person remains unaccounted for. and investigators are using cadaver dogs to help them comb through this debris. it was dinnertime when this explosion turned everything upside-down. witnesses say the massive fireball, which engulfed an entire city block, could be seen for miles. the explosion, rattling windows blocks away. >> everything shook. and it was -- you could feel it, almost as much as you could hear it. it was, by far, the biggest explosion i'd ever felt in my life.